Grinding or polishing apparatus.



'7 PATENTED MAY 30, 1905';

-H.-A. WEBER. GRINDING 0R POLISHING APPARATUS, V

APPLICATION FILED DEC-31. 1903.

Inventor m WW Wiinesses;

Patented May 30, 1905.

PATENT GEEICE.

HENRY ADAM l/VEBER, OF NEW YORK, N. Y.

GRINDING OR POLISHING APPANATUS.

SPECIFICATION forming part of Letters Patent No. 790,943, dated May 30,1905.

Application filed December 31, 1903. a1N0- 187,280.

To all whom, it may concern:

Be it known that I, HENRY ADAM WVEBER, a citizen of the United States,residing in the borough of Manhattan, city of New York, county of NewYork, and State of New York, have invented certain new and usefulImprovements in Grinding or Polishing Apparatus, of which the followingis a specification, reference being had therein to the accompanyingdrawings, forming a part thereof.

My invention relates to grinding or polishing apparatus, and moreparticularly to means for receiving and drawing off the flying particlesliberated during the grinding and polishing operations In the operationsof grinding and polishing grit or fiber or other particles inconsiderable quantities will be abraded from the surface of the wheelsand to some extent particles will fly from the article ground orpolished and particles of rouge or polishing-powder will be thrown offin considerable quantities, and frequently these particles will be insuch fine condition and under such frictional heat as to igniteinflammable substances in their path and will be otherwise troublesomeand dangerous, and it is therefore highly desirable and usuallynecessary that grinding or polishing wheels should be housed or hoodedso far as possible and that exhaust devices should be provided forreceiving and drawing off the particles hurled from the grinding orpolishing wheels.

According to my invention I provide means for diverting thesubstantially tangential path of the fiber or grit or other particlesthrown off during the grinding or polishing operation and the currentsof air generated by the rapid rotation of the grinding or polishingwheels and for utilizing the motion or momentum of these currents of airand of the flying particles to develop a force for the purpose ofcontinually blowing out and clearing the hood. Thus by the operationwhich causes these flying particles to be liberated I develop asubstantial force which will draw these particles into the hood andcarry them in a closed conduit to a substantial distance from the placeof grinding or polishing.

I will now describe the construction shown in the accompanying drawingsand embodying my invention and will thereafter point out my invention inclaims.

Figure 1 is a longitudinal vertical section of my complete device asused in connection with a single grinding or polishing wheel. Fig. 2 isa front view of two grinding or polishing wheels, showing the joining ofthe outlets into a common conduit.

In the embodiment of my invention illustrated in the drawings the hood 3is shown as somewhat in the shape of a helmet, tapering at its lower endto a restricted lower outletconduit 15. The grinding or polishing wheel1 is properly exposed through a portion of its periphery to permit thearticles which are to be ground or polished to beheld in contacttherewith. The direction of rotation of the grinding or polishing wheel1 is such that its exposed portion moves downward, as indicated by thearrow 2. The hood 3 has a lower forwardly-extending portion t, whichprojects forward beneath the wheel sufiiciently to receive the particlesdirectly thrown ofl" at the place of grinding or polishing,and the hoodis provided interiorly with a plurality of transverse deflecting vanesor partitions 5, which extend outward from points in proximity to theperiphery of the wheel to points at a suitable distance from the outerperipheral wall 9 of the hood, these par- 80 titions 5 being arranged sothat the particles and air-currents which impinge upon them will bedeflected outward toward the outer peripheral wall 9 of the hood, eachvane being substantially clear of the path of deflected flying particlesand air-currents from its next adjacent vane. The partitions 5 extendoutward in proper directions to perform their deflecting functions andin the embodiment of my invention shown in the drawings are ar- 0 rangedon radial lines,merging into backward curvature in proximity to theirouter ends, so that they will receive the particles thrown off from thewheel and the air-currents generated by the rapid rotation of the wheeland deflect them outward and backward toward the outer peripheral wall 9of the hood and into the space or conductive channel 14 between theouter ends of the partitions and the outer peripheral wall of the hood,in which conduct- I60 ive channel the particles and air-currentsdiverted by the several partitions will meet or commingle and movetogether toward the lower portion of the hood. The upper front wall 7 ofthe hood has a shape corresponding to that of the partitions, beingshown as partly radial, with its radial line merging into an outward andbackward curvature which merges into the outer peripheral wall 9 of thehood. The partition 5 next to this front wall approaches at its outerend more closely to the outer peripheral wall 9 than succeedingpartitions, except the first or lower partition, and the distancesbetween the outer ends of the partitions 5 and the outer peripheral wall9 increase up to the first or lower partition, so as to provide a spaceor conductive channel 14 between the partitions and outer wall, which isof increasing area in the direction of motion of the moving mediumtherein to a point in proximity to the lower outlet 8 thereof, and thisis shown as accomplished by making all of the partitions except thefirst or lower partition of the same shape and of equal length andterminating in acircumference concentric with the axis of the wheel andby shaping the outer peripheral wall in a curve gradually departingoutwardly from such concentric circumference and merging into thedownwardly and forwardly inclined rear wall 11 of the hood. Theair-currents and moving particles deflected by the front of the hoodwill be directed rearwardly 'in this conductive channel 14, and theair-currents and moving particles deflected by the next partition willbe commingled therewith or added thereto, and each succeeding partitionwill add its quota of air-currents and moving particles, and theaccumulated force of the moving medium will be such thatthe particleswill be carried or blown with great vehemence through the conductivechannel 14. The lower partition 5 is shown as considerably longer thanthe outer partitions, terminating outwardly in a downwardly-extendingportion 6, which converges toward the outer rear wall 11 of the hood, sothat the conductive channel diminishes in area in the directionof'motion of the moving medium therein in proximity to its outlet 8,thereby tending to increase the Velocity of the particles and movingcurrents therein at the outlet 8. The lower or first partition 5 willdeflect its quota of air-currents and moving particles and in additionthereto direct tangential currents, and moving masses of particles willalso be projected downward from the wheel into the lower portion of thehood and toward the lower outlet 12 thereof, from which they will enterthe common outlet-conduit 15, and this lower portion is of diminishingarea in the direction of motion of the moving medium therein and willtend to maintain or increase the velocity of the air-currents andparticles moving therethrough, and the projected air-currents and movingparticles from the conductive channel 14 and the lower portion 4escaping at the outlets 8 and 12 thereof, respectively, will enter thecommon outlet-conduit 15 in substantially the same direction and willmove together through the conduit 15, so that the particles will hecarried to the point of deposit, which in the construction shown iswithin the particle receiver or separator 13, connected by the conduit.15 to the lower portion of the hood. The separator has an outlet-conduit16 for the air and a plurality of downwardly-inclined partitions 17, andthe particles will gravitate to the bottom of the separator, while theair will escape through the air-outlet 16.

In the construction shown in Fig. 2 two wheels are separately providedwith hoods 3 of the construction above described, and theoutlet-conduits 15 of the hoods are merged and connected to a commonseparator 13.

Should it be desired to carry the particles to a greater distance thancan be reliably done by the automatic action above described, a fan orother exhausting device may be provided, located at the air-outlet of acommon separator; but in this event the work required of the exhaustingdevice will only be such as is necessary to sufficiently supplement theautomatic blowing action to effect the carriage of the particles theadditional distance.

It will be noted that the front wall 7 of the hood and the severaldirecting-partitions 5 within the hood form a plurality of coactingdeflecting and directing vanes and that these vanes and the lowerportion of the hood will receive and deflect all air-currents andparticles moving outwardly from the wheel over the greater portion ofthe periphery thereof from the point of grinding or polishingapproximately to the point of the necessary exposure of the wheel.

It is obvious that various modifications may be made in the constructionshown and above particularly described within the spirit and scope of myinvention.

WhatI claim, and desire to secure by Letters Patent, is

1. A hood for a grinding or polishing wheel containing a plurality ofvanes successively arranged with each vane extending from a pointinproximity to the grinding or polishing wheel to a point at a distancefrom the outer periphery of the hood so as to provide,

-in proximity to the grinding or polishing wheel, a plurality ofopenings between the vanes extending from each vane to the next adjacentvane, and so as to provide, beyond the outer ends of the vanes, aconductive channel for flying particles deflected by the vanes.

2. A hood for a grinding or polishing wheel provided with a plurality ofdeflecting-vanes and with a conductive channel beyond the outer ends ofthe vanes, such conductive channel having an outlet therefrom andincreasing in area in the direction of the motion of the moving mediumtherein through a portion of its length and diminishing in area in thedirection of the motion of the moving medium therein in proximity to itsoutlet.

3. A hood for a grinding or polishing wheel containing a plurality ofvanes arranged with each vane extending from a point in proximity to thegrinding or polishing wheel to a point at a distance from the outerperiphery of the hood so as to provide, in proximity to the grinding orpolishing wheel, a plurality of openings between the vanes extendingfrom each vane to the next adjacent vane, and so as to provide, beyondthe outer ends of the vanes, a conductive channel for flying particlesdeflected by the vanes, the first deflecting-vane being located abovethe axis of the grinding or polishing wheel and in advance thereof andthe vanes being successively arranged about the grinding or polishingwheel and the last vane being located in rear and below the axis of thegrinding and polishing wheel, and the lower portion of the hood beingopen in the direct path of the flying particles from the point ofgrinding or polishing, and a common outlet for such conductive channeland lower portion.

4. A hood for a grinding or polishing wheel provided with a plurality ofdeflecting-vanes and with a conductive channel beyond the outer ends ofthe vanes, and provided with a lower 'portion open in the direct path ofthe flying particles from the point of grinding or polishing, theconductive channel and lower portion having a common outlet and thelower portion diminishing in area in the direction of motion of themoving medium therein in proximity to the outlet.

5. A hood for a grinding or polishing wheel provided with a plurality ofdeflecting-vanes and a conductive channel beyond the outer ends of thevanes, such conductive channel increasing in area in the direction ofmotion of the moving medium therein through a portion of its length, thehood being also provided with a lower portion open in the direct path ofthe flying particles from the point of grinding or polishing, theconductive channel and lower portion having a common outlet anddiminishing in area in the direction of motion of the moving mediumthereinin proximity to such outlet.

6. A hood for a grinding or polishing wheel provided with a plurality ofdeflecting-vanes relatively arranged with each vane substantially clearof the path of deflected air-currents and flying particles from its nextadjacent vane, and a conductive channel beyond such vanes having anoutlet therefrom and increasing in area in the direction of the motionof the moving medium therein through a portion of its length anddiminishing in area in the direction of motion of the moving mediumtherein in proximity to its outlet.

7. A hood for a grinding or polishing wheel provided with a plurality ofdeflecting-vanes relatively arranged with each vane substantially clearof the path of deflected air-currents and flying particles from its nextadjacent vane, and with a conductive channel beyond the outer ends ofthe vanes and also provided with a lower portion open in the direct pathof the flying particles from the point of grinding or polishing, andwith a common outlet for such conductive channel and lower portion,substantially as set forth.

8. A hood having a grinding or polishing wheel containing a plurality ofvanes successively arranged with each vane extending from a point inproximity to the grinding or polishing wheel to a point at a distancefrom the outer periphery of the hood and with successive vanesterminating at their outer ends at increasing distances from the outerperiphery of the hood, so as to provide, in proximity to the grinding orpolishing wheel, a plurality of openings between the vanes extendingfrom each vane to the next adjacent vane, and so as to provide, beyondthe outer ends of the vanes, a conductive channel for flying particlesdeflected by the vanes, such conductive channel increasing in area inthe direction of the moving medium therein.

9. A hood for a grinding or polishing wheel provided with a plurality ofdeflecting-vanes extending outward in substantially radial lines merginginto backward curvature in proximity to their outer ends and relativelyarranged with each vane substantially clear of the path of deflectedair-currents and flying particles from its next adjacent vane, and alsoprovided with a conductive channel beyond the outer ends of the vanes,the hood being also provided with a lower portion open in the directpath of the flying particles from the point of grinding or polishing andwith a common outlet for the conductive channel and lower portion, theconductive channel and lower portion diminishing in area in thedirection of the motion of the moving medium therein in proximity tosuch outlet, substantially as set forth.

In testimony whereof I have aflixed my signature in presence of twowitnesses.

HENRY ADAM WEBER.

Witnesses:

C. (J. HOTTENROTH, HENRY BARNES.

LOO

